tree b2f148f6469d1319bc5e81abe09e6d358a254cd4
parent 2b8ed1c94182dbbd0163d0eb443a934cbf6b0d85
author Pavel Begunkov <asml.silence@gmail.com> 1616839170 +0000
committer Jens Axboe <axboe@kernel.dk> 1616976713 -0600

io_uring: always go for cancellation spin on exec

Always try to do cancellation in __io_uring_task_cancel() at least once,
so it actually goes and cleans its sqpoll tasks (i.e. via
io_sqpoll_cancel_sync()), otherwise sqpoll task may submit new requests
after cancellation and it's racy for many reasons.

Fixes: 521d6a737a31c ("io_uring: cancel sqpoll via task_work")
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/0a21bd6d794bb1629bc906dd57a57b2c2985a8ac.1616839147.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>